Multimeter
This tool checks electricity. It can tell if a wire works. It also checks power. It helps fix things. This is a very handy tool. Do you like to fix things?
Early Reader · Change the reading level on the articleTechnology articles — Page 58
Explore inventions, engineering, computing and the tools people build to solve problems. Choose an article below; its reading controls let you move between the available levels.
4,107 public articles · Page 58 of 86
Try related engineering and scientific-investigation activities in Science Lab.
Multiple rocket launcher
Some machines shoot many rockets at once. They can shoot them very fast. This helps them hit a big area. These machines have been used for a long time. They help people in wars. Do you like machines?
Early Reader · Change the reading level on the articleMultiplexing
Many messages can use one wire. This helps us share things. It works like a big group of calls on one line. It makes things easier for everyone. Do you like to share your toys?
Early Reader · Change the reading level on the articleMultiprocessing
A computer can have more than one brain. These brains work together. They can do many jobs at once. This helps the computer work fast. It is like having two friends help you. Do you like to work with friends?
Early Reader · Change the reading level on the articleMultirole combat aircraft
Some jets can do many jobs. They can fly fast in the sky. They can also help on the ground. This helps them do more work. It is very smart. Can you imagine flying a jet?
Early Reader · Change the reading level on the articleMultithreading (computer architecture)
Your computer can do many things. It can work on more than one task. This helps it work fast. It does not stay idle. It keeps moving. It is like a busy helper. Do you like fast computers?
Early Reader · Change the reading level on the articleMumbai Metro
The Mumbai Metro is a fast train. It helps people move in a big city. The trains help stop too much traffic. It is good for everyone. Do you like riding trains?
Early Reader · Change the reading level on the articleMunich U-Bahn
Trains run under the ground in Munich. They move people all around the city. Many people ride these trains every day. It helps us get to many places. The trains are very fast. Do you like to ride trains?
Early Reader · Change the reading level on the articleMuscle car
A muscle car is a fast car. It has a very strong engine. This engine helps it go fast. These cars are made in America. They are fun to see. Do you like fast cars?
Early Reader · Change the reading level on the articleMusée des Arts et Métiers
This is a big museum in Paris. It holds many old tools and machines. You can see old planes and cars. It helps us learn about how things work. It is a fun place to visit. Do you like old machines?
Early Reader · Change the reading level on the articleMuseum of Science and Industry (Chicago)
This is a big science museum. It is in Chicago. You can see a fast train. You can see a space ship too. It is fun to learn here. Do you like science?
Early Reader · Change the reading level on the articleMusic in advertising
Ads use music to help us notice things. The songs can make us feel happy. Some songs can even make us feel sad. This helps us remember what they are selling. Music makes ads fun to watch. Do you like songs in ads?
Early Reader · Change the reading level on the articleMusic sequencer
A sequencer helps make music. It can record a song. It can play a song back. It helps us hear new sounds. It is a fun tool for music. Do you like to sing songs?
Early Reader · Change the reading level on the articleMuzzleloader
A muzzleloader is an old kind of gun. You put the powder in the front. Then you put the ball in the front. You use a stick to push it down. It is fun to see how they work. Do you want to learn more?
Early Reader · Change the reading level on the articleMyspace
Myspace was a place to talk online. People used it to meet friends. It helped many people find new music. It was a very big site. Many people visited it every day. Do you like to talk to friends online?
Early Reader · Change the reading level on the articleMySQL
Computers use tools to keep facts. One tool is called MySQL. It holds lots of info in tables. This helps big websites work well. It is a very helpful tool. Do you like using websites?
Early Reader · Change the reading level on the articleNaginata
A naginata is a long tool. It has a long pole. A sharp part is on the end. It was used by many people in Japan. It helped them stay safe. Do you like to learn about old tools?
Early Reader · Change the reading level on the articleNagoya Municipal Subway
Trains run under the city. They go in tunnels. Most tracks are deep underground. This helps people move fast. It helps us get to many places. The trains are very busy. Do you like train rides?
Early Reader · Change the reading level on the articleNail gun
A nail gun is a tool. It works like a hammer. It pushes nails into wood. This helps people build things fast. It is very helpful. Do you like to build things too?
Early Reader · Change the reading level on the articleNamco
Namco makes fun games. They make games for arcades. They also make toys and films. Many people love to play them. Do you like to play games?
Early Reader · Change the reading level on the articleNameplate capacity
A big power plant has a limit. It shows how much work it can do. It works best on a sunny day. It might not work as much in the rain. This helps us know what to expect. Can you see the sun today?
Early Reader · Change the reading level on the articleNamma Metro
The Namma Metro is a fast train. It helps people move in a big city. Some tracks are high up. Some tracks go under the ground. It is a great way to travel. Do you like trains?
Early Reader · Change the reading level on the articleNAND gate
Small parts help computers think. They use tiny switches. These switches work in a special way. They help make a whole computer. This helps us play games. Do you like computers?
Early Reader · Change the reading level on the articleNanoelectromechanical systems
Tiny machines are very small. They can move and use power. They can even sense the air. These machines help us build new things. They make our tools small and fast. Do you like small things?
Early Reader · Change the reading level on the articleNanofiltration
Special tools clean our water. They have tiny holes. These holes are very, very small. They let clean water through. They stop the bad stuff. This helps make water safe. Do you like clean water?
Early Reader · Change the reading level on the articleNapster
Napster was a way to share music. People used it to find songs. It helped many people hear new music. It was very popular for a time. Now, the name is used for a different music service. Do you like to listen to music?
Early Reader · Change the reading level on the articleNasdaq
Nasdaq is a big place for business. It uses computers to trade. Many new tech companies are there. It helps people buy parts of a company. This is how money moves. Do you like computers?
Early Reader · Change the reading level on the articleNational Association of Broadcasters
This group helps radio and TV stations. They work in the United States. They help many stations talk to you. This helps us see and hear things. It is a big job. Do you like to watch TV?
Early Reader · Change the reading level on the articleNational Enquirer
This is a special news paper. It tells big stories. It was made a long time ago. People read it to learn news. It can be very loud. Do you like to read news?
Early Reader · Change the reading level on the articleNational Rail
National Rail is for trains. It helps people travel. Many companies run the trains. You can buy one ticket for a trip. It makes travel easy for you. Do you like to ride trains?
Early Reader · Change the reading level on the articleNational Technical Museum
This is a big museum. It holds many old things. You can see old cars and planes. It helps us learn about how things work. It is a fun place to go. Do you like old planes?
Early Reader · Change the reading level on the articleNatural language processing
Computers can learn to talk. They can hear your voice. They can read your words. This helps us talk to machines. It is very cool! Can you talk to a computer?
Early Reader · Change the reading level on the articleNaval architecture
People design big ships and boats. They make sure ships stay afloat. They help ships move through water. This helps carry things across the sea. It is a very big job. Do you like big boats?
Early Reader · Change the reading level on the articleNaver
Naver is a big website. It helps people find things online. You can use it to read news or maps. It can even help you learn. It is a very helpful tool. Do you like to look things up online?
Early Reader · Change the reading level on the articleNaviglio di Bereguardo
This is a long path for boats. It is in a place called Italy. The water helps move things on land. It also helps plants grow. It was built a long time ago. Can you see the boats?
Early Reader · Change the reading level on the articleNd:YAG laser
Some special crystals make bright light. This light can be green. It can even be used by doctors. It helps fix eyes and teeth. It can also cut metal. It is very strong. Can you imagine a green light like that?
Early Reader · Change the reading level on the articleNear-field communication
Two things can talk without wires. You can tap them close together. This helps you pay for things. It can even charge small tools. It is very fast and easy. Do you have a phone that can do this?
Early Reader · Change the reading level on the articleNEC
NEC is a big company. It is in Japan. They make tools for computers. They help people talk on phones. This helps the whole world. Do you use a computer?
Early Reader · Change the reading level on the articleNegative impedance converter
Some parts add power to a circuit. Most parts use up power. This part works in a new way. It can push energy back. This helps tools work better. It is very smart! Can you imagine that?
Early Reader · Change the reading level on the articleNeon lighting
Neon lights glow in many colors. They are bright glass tubes. They can make shapes and letters. These lights help us see at night. They make cities look pretty. Do you like bright lights?
Early Reader · Change the reading level on the articleNerva
People made a special rocket engine. It used heat to go fast. It was very strong. It could help us go to Mars. We did not fly it in space. Do you like rockets?
Early Reader · Change the reading level on the articleNet (device)
A net is made of many strings. The strings make a grid. It can hold big things. It lets small things pass through. Nets help us catch fish. We can also sleep in them. Have you seen a net?
Early Reader · Change the reading level on the articleNetflix
Netflix lets you watch movies. You can watch shows on a screen. It works through the internet. Many people use it at home. It is fun to use. Do you like to watch shows?
Early Reader · Change the reading level on the articleNetwork interface controller
A computer part helps us talk. It lets computers join a group. This group is called a network. It can use wires or air. This helps you play and learn. Do you like to use the web?
Early Reader · Change the reading level on the articleNetwork on a chip
A chip is very small. It has many parts inside. These parts need to talk. A tiny network helps them. It sends messages like a road. This makes the chip work well. Can you imagine a tiny road?
Early Reader · Change the reading level on the articleNetwork packet
Computers send info in small bits. These bits are like little mail. Each bit has a home address. This helps it find its way. It helps us talk to friends. Can you send a note? It is fun to share!
Early Reader · Change the reading level on the articleNetwork switch
A switch helps computers talk. It connects many machines together. It sends data to the right place. This helps the work go fast. It is very smart. Do you use a switch at home?
Early Reader · Change the reading level on the articleNetwork topology
Computers can talk to each other. They use wires or air to send news. Some use long glass strings. Others use waves in the air. This helps us share things. How do your tools talk?
Early Reader · Change the reading level on the article